feat(catalog): add coord v0.1.0

Local inter-repo coordination mailbox — directed messages and broadcasts
between Claude Code sessions, injected as context at session start.
New plugin repo: open/coord, pinned at v0.1.0. check-versions: 11/11 OK.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HBbjgS5A55RVavoyjJC4FX

.claude-plugin/marketplace.json

@@ -99,6 +99,15 @@
         "ref": "v0.1.0"
       },
       "description": "End-to-end facilitator for prompting Claude Design (claude.ai/design) — idea to copy-paste-ready prompt with iteration coaching, citing Anthropic primary sources."
+    },
+    {
+      "name": "coord",
+      "source": {
+        "source": "url",
+        "url": "https://git.fromaitochitta.com/open/coord.git",
+        "ref": "v0.1.0"
+      },
+      "description": "Local mailbox for coordination between Claude Code sessions in different repositories — directed messages and broadcasts injected as context at session start. Local, private, no network."
     }
   ]
 }

README.md

@@ -176,6 +176,18 @@ End-to-end facilitator for prompting Claude Design (`claude.ai/design`). Walks y
 
 ---
 
+### [Coord](https://git.fromaitochitta.com/open/coord) `v0.1.0`
+
+A local mailbox for coordination between Claude Code sessions in different repositories. Session A in repo X leaves a message for repo Y; the next session in repo Y gets it injected as context at startup. Local, private, no network, no SaaS.
+
+- **Deliver until done** — directed messages re-inject at every session start (`/clear` never loses them) until replied to or archived; broadcasts deliver once per repo via a seen set
+- **Untrusted by design** — message content is quote-prefixed and framed as untrusted data; send-side field sanitization blocks frontmatter injection
+- **Natural-language sending** — the `coord-send` skill maps "tell repo-x the bug is fixed" to the right delivery: broadcasts, bounded multi-target loops, replies, and deferred sends
+
+1 hook · 1 skill · 3 CLI scripts · 48 selftest checks · [Full documentation →](https://git.fromaitochitta.com/open/coord)
+
+---
+
 ## Shared infrastructure
 
 ### [Playground Design System](https://git.fromaitochitta.com/open/playground-design-system) `v0.6.0`